Tele-measurement with virtual instrumentation using web-services
Dan Robu, Vlad Fernoaga, George Alex Stelea, Florin D. Sandu · 2017
The web-services for tele-measurement are approached by REST (Representational State Transfer) as the unified representation of states-transition-events that enables a true integration of resource management in a distributed environment by simplifying the algorithmic state machines associated with both services and behavioral patterns of instruments. Each of the sensors we used got an own ESP8266-based Wi-Fi micro-system to publish its specific values in the Cloud. Forwarding from the public address of the router to the Intranet address is monitored by a National Instruments Web-Shared Variables server. Data produced by the sensors, accompanied by their presentation methods are taken-over by a web-based “thin client”, a dynamic and adaptive content-to-terminal “Control Board” developed to manage and connect the tele-measurement services, using a graphical user interface, with simple browser access and without the need to install additional third party modules and plugins.